"use strict";
//函数的声明
function add(a, b) {
    return a + b;
}
//箭头函数
let sub = (a, b) => {
    return a - b;
};
// sub(123, 0x123);
//函数另一种声明
let times;
times = function (a, b) {
    return a * b;
};
//合在一起的写法
let divide = (a, b) => {
    return a / b;
};
//函数省略返回值类型声明
let yu = (a, b) => {
    return a % b;
};
//可选参数  作用: 截取字符串  splice  slice  addEventListener
// let slice = (str: string, start: number, end ?: number) => {
// }
// slice('love', 1, 2);
// slice('love', 1);
//参数默认值
// let buildPhone = (code:string, area:string='+86') => {
// }
// buildPhone('18319840924', '+86');
// buildPhone('18319840924');
// rest 参数  push  splice
let sum = (...args) => {
    console.log(args);
};
sum(1);
sum(1, 2);
sum(1, 2, 3);
sum(1, 2, 3, 5);
